If your ISP provide you a dynamic IP to you, you need to subscribe to a dynamicDNS service provider supported from your NAT broadband router and put your hostname freshly created and configure it to forward external port to your internal ip address port of your NAT/ broadband router
or
If your ISP provide you a static IP to you, you need to forward external port to your internal LAN port IP address configure it to your NAT/router.

http://www.simpleportforwarding.com/node/8Simple Port Forwarding works with WebPages and not directly with your router. Making it a safe program to use. Its no different than using Firefox, IE or any other browser to setup port forwarding yourself.The program works by automating the process for you. So whether you don't understand how to forward ports, or your simply looking for an easier way to forward ports then this program is for you.Its port forwarding made simple.

FQDN= Fully Qualified Domain NameA fully qualified domain name consists of a host and domain name, including top-level domain.
For example, www.uvnc.com is a fully qualified domain name.
www is the host,
uvnc is the second-level domain,
.com is the top level domain.

for reach your vnc server from vncviewer:

for reach your vnc server from web browser:

port 80 is standard http port and not usable if you have web server
but 5800 is not a standard port for http so you need follow step below:

don't forget to put http:// at header

external usage (outside of your office, home from your web browser)reach vnc server over Internet with FQDN address (with right access )or your own rent a static public IP address ((you know because is on your contract)

I want to use Single click and I have multiple host account I have tried to create sc and that only work for single user, now I want to configure a helpdesk file which allow to select the technician name and connect, I would like to use the repeater because my router have limited port forwarding option here, if you can help me with the repeater and helpdesk.txt file, I will be greatly helped here, I've searched through the all internet haven't found anything now and also want tried creating 100 of sc file but no luck yet.